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Why aren't convenience samples usually representative of the population?
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Why are random samples more representative of the population than other kinds of samples?
A 'random' sample - covers all age groups, genders, and other criteria. A 'targeted' sample might only cover a small part of the population.
Difference between sample regression and population regression line?
AnswerA sample is a subset of a population. Usually it is impossible to test an entire population so tests are done on a sample of that population. These samples can be selected so that they are representative of the population in which cases the sample will have weights, strata, and clusters. But usually people use random samples. So it's not that the line is different, it's that the line comes from different data. In stats we have formulas that allow a sample to represent a population, if you have the entire population (again unlikely), you wouldn't need to use this sample formulas, only the population formulas.
Do small samples and large population variances usually underestimate or be close to population mean?
Small samples and large population variances imply that the estimate for the mean will be relatively poor. Whether or not it will result in an underestimate or overestimate depends on the distribution: with a symmetric distribution the two outcomes are equally likely.
How to reduce sampling error?
The only way to get rid of sampling error is to use the entire population under study. This is usually impossible, so the next best thing is to use large samples and good sampling methods.
Is it true or false that a convenience sample usually consist of respondents with strong opinions?
Yes
Why are random samples more representative of the population than other kinds of samples?
A 'random' sample - covers all age groups, genders, and other criteria. A 'targeted' sample might only cover a small part of the population.
Difference between sample regression and population regression line?
AnswerA sample is a subset of a population. Usually it is impossible to test an entire population so tests are done on a sample of that population. These samples can be selected so that they are representative of the population in which cases the sample will have weights, strata, and clusters. But usually people use random samples. So it's not that the line is different, it's that the line comes from different data. In stats we have formulas that allow a sample to represent a population, if you have the entire population (again unlikely), you wouldn't need to use this sample formulas, only the population formulas.
A convenience sample will usually result in?
under coverage
Do small samples and large population variances usually underestimate or be close to population mean?
Small samples and large population variances imply that the estimate for the mean will be relatively poor. Whether or not it will result in an underestimate or overestimate depends on the distribution: with a symmetric distribution the two outcomes are equally likely.
What does convenience shops mean?
A convenience shop is a small supermarket that is usually conveniently open long hours.
What are cardiac ct angio result samples?
The cardic CT angio result samples refer to the samples that are usually taken to diagnose the heart problems.
Why do people buy from shops in the neighbourhood?
Usually for convenience.
What is a usually true of a convenience sample?
Type your answer heA.under-coveragere...
Which of these is usually true of a convenience sample?
It excludes those who are indifferent.
Are minority races really the minority of the world's population?
Mostly no. It just depends on where you live. Usually people are called minorities if they have fewer representative people in a certain country... but that doesn't have anything to do with what race is a minority throughout the population of the Earth.
What does the medical term preserved mean?
The term preserved usually refers to samples, such as those taken for analysis. Preservation keeps the samples, usually some kind of body tissue, from spoiling or degenerating.
The representative elements are usually called?
Group A elements.
